Depends on where i'm standing. If I get on, or near the rail, theres no way i'm going to lose my spot just to mosh. When i'm near the back or floating in the middle i'll mosh during certain songs. Its usually a ritual for me to mosh during Demon of the Fall though. All 4 times i've seen Opeth i've been in the pit for Demon. Its awesome being in the pit, then looking up and seeing Opeth shredding faces off.